1142023021 has 4 divisors (see below), whose sum is σ = 1146801600. Its totient is φ = 1137244444.

The previous prime is 1142023013. The next prime is 1142023031. The reversal of 1142023021 is 1203202411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1142023021 - 2³ = 1142023013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1142022986 and 1142023004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142023031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2388931 + ... + 2389408.

It is an arithmetic number, because the mean of its divisors is an integer number (286700400).

Almost surely, 2^1142023021 is an apocalyptic number.

It is an amenable number.

1142023021 is a deficient number, since it is larger than the sum of its proper divisors (4778579).

1142023021 is an equidigital number, since it uses as much as digits as its factorization.

1142023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4778578.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1142023021 is about 33793.8311086506. The cubic root of 1142023021 is about 1045.2614963362.

Adding to 1142023021 its reverse (1203202411), we get a palindrome (2345225432).

The spelling of 1142023021 in words is "one billion, one hundred forty-two million, twenty-three thousand, twenty-one".